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Subtract 16/21 from 8/15

8/15 - 16/21 is -8/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    8/15 = 8 × 7/15 × 7 = 56/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    16/21 = 16 × 5/21 × 5 = 80/105
  4. Subtract the two like fractions:
    56/105 - 80/105 = 56 - 80/105 = -24/105
  5. After reducing the fraction, the answer is -8/35

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